It's hard to tell if you're getting more joy out of life, but it's easy to score yourself on keeping a weekly outing with friends.
很难说是自己有没有正从生活中获得乐趣，然而，记下每周一次和朋友们出去游玩却容易做到。Space can have positive curvature, like the surface of a sphere, or negative curvature, like the surface of a saddle.
空间可以向球面一样有正的曲率，也可以像马鞍面一样有负的曲率。There was positive correlation between the number of practicing time, practicing hours, and participation motivation in consumer behavior.
学员的消费行为中的练习次数、练习时间与消费动机有正相关；The daily temperature gap accounted the main effects on the caloric value of two rice varieties and with the minimum coefficient variation.
温度日较差对热值有正影响效应，且具有较低的变异系数，雨量与雨日的正效应起修饰作用。If the horizontal resolution of a device equals the vertical resolution, the device is said to have "square pixels. "
如果设备的水平分辨宽度等于垂直分辨高度，那么设备被称作有“正方形像素”。There was no correlation between zoospore and sporangium yeild in different medium.
游动孢子的浓度与孢子囊的浓度没有正相关性。Like a battery, they use positive and negative electrodes separated by an electrolyte.
燃料电池像电池一样，有正、负电极，两极之间是电解液。A net present value of greater than zero indicates that the project has positive net economic benefit to the company.
净现值大于零说明项目对公司有正的净经济效益。But not every polluter has upstanding Norwegians investing in it, or holds its AGM in London.
但是并非每一个污染企业都有正值的挪威人对其进行调查、或者在伦敦举行（阻止该）企业年度大会。